Smoltification
Smoltification is a preparatory adaptation, behavioral, developmental, and physiological changes enabling a juvenile salmonid fish to adapt from fr
The major changes involve ion and water regulation via kidneys and gills. In sea water chloride cells in gills excrete salts and kidneys reduce water loss by actually stopping urine production, whereas in fresh water salts are retained by the gills and the kidneys produce large amounts of diluted urine.
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